freedreno: Fix leak of binning shader variants.
The v->binning variant is never added to shader->variants, so just free each one as we free the nonbinning variant.
Noticed from drm-shim mode running out of open fds, since each bo ends up with an fd.
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The v->binning variant is never added to shader->variants, so just free each one as we free the nonbinning variant.
Noticed from drm-shim mode running out of open fds, since each bo ends up with an fd.